Many times I write a post and then see that I missed some information. In my last post I didn't miss something. Some added information would make things clearer.
I live in Red Deer, Alberta Canada. My province is 1200 km(751miles ) from north to south. It is 610 Km ( 410 miles east to west. )
It's the 6th largest province in Canada.
Travelling to Inuvik we always stopped for fuel in Yellowknife. I also attended 2 conferences there. In the early 1960's it was very much a frontier town. It was established as a gold mining town. Oh yes, I got a tour of one of the gold mines.
I hope that this helps to make sense of the distances involved in the evacuation.